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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/arch/alpha/kernel/sys_ruffian.c | |
4 | * | |
5 | * Copyright (C) 1995 David A Rusling | |
6 | * Copyright (C) 1996 Jay A Estabrook | |
7 | * Copyright (C) 1998, 1999, 2000 Richard Henderson | |
8 | * | |
9 | * Code supporting the RUFFIAN. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/pci.h> | |
17 | #include <linux/ioport.h> | |
08604bd9 | 18 | #include <linux/timex.h> |
1da177e4 LT |
19 | #include <linux/init.h> |
20 | ||
21 | #include <asm/ptrace.h> | |
1da177e4 LT |
22 | #include <asm/dma.h> |
23 | #include <asm/irq.h> | |
24 | #include <asm/mmu_context.h> | |
25 | #include <asm/io.h> | |
26 | #include <asm/pgtable.h> | |
27 | #include <asm/core_cia.h> | |
28 | #include <asm/tlbflush.h> | |
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29 | |
30 | #include "proto.h" | |
31 | #include "irq_impl.h" | |
32 | #include "pci_impl.h" | |
33 | #include "machvec_impl.h" | |
34 | ||
35 | ||
36 | static void __init | |
37 | ruffian_init_irq(void) | |
38 | { | |
39 | /* Invert 6&7 for i82371 */ | |
40 | *(vulp)PYXIS_INT_HILO = 0x000000c0UL; mb(); | |
41 | *(vulp)PYXIS_INT_CNFG = 0x00002064UL; mb(); /* all clear */ | |
42 | ||
43 | outb(0x11,0xA0); | |
44 | outb(0x08,0xA1); | |
45 | outb(0x02,0xA1); | |
46 | outb(0x01,0xA1); | |
47 | outb(0xFF,0xA1); | |
48 | ||
49 | outb(0x11,0x20); | |
50 | outb(0x00,0x21); | |
51 | outb(0x04,0x21); | |
52 | outb(0x01,0x21); | |
53 | outb(0xFF,0x21); | |
54 | ||
55 | /* Finish writing the 82C59A PIC Operation Control Words */ | |
56 | outb(0x20,0xA0); | |
57 | outb(0x20,0x20); | |
58 | ||
59 | init_i8259a_irqs(); | |
60 | ||
61 | /* Not interested in the bogus interrupts (0,3,6), | |
62 | NMI (1), HALT (2), flash (5), or 21142 (8). */ | |
63 | init_pyxis_irqs(0x16f0000); | |
64 | ||
65 | common_init_isa_dma(); | |
66 | } | |
67 | ||
04d8a9db | 68 | #define RUFFIAN_LATCH DIV_ROUND_CLOSEST(PIT_TICK_RATE, HZ) |
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69 | |
70 | static void __init | |
71 | ruffian_init_rtc(void) | |
72 | { | |
73 | /* Ruffian does not have the RTC connected to the CPU timer | |
74 | interrupt. Instead, it uses the PIT connected to IRQ 0. */ | |
75 | ||
76 | /* Setup interval timer. */ | |
77 | outb(0x34, 0x43); /* binary, mode 2, LSB/MSB, ch 0 */ | |
78 | outb(RUFFIAN_LATCH & 0xff, 0x40); /* LSB */ | |
79 | outb(RUFFIAN_LATCH >> 8, 0x40); /* MSB */ | |
80 | ||
81 | outb(0xb6, 0x43); /* pit counter 2: speaker */ | |
82 | outb(0x31, 0x42); | |
83 | outb(0x13, 0x42); | |
84 | ||
85 | setup_irq(0, &timer_irqaction); | |
86 | } | |
87 | ||
88 | static void | |
89 | ruffian_kill_arch (int mode) | |
90 | { | |
91 | cia_kill_arch(mode); | |
92 | #if 0 | |
93 | /* This only causes re-entry to ARCSBIOS */ | |
94 | /* Perhaps this works for other PYXIS as well? */ | |
95 | *(vuip) PYXIS_RESET = 0x0000dead; | |
96 | mb(); | |
97 | #endif | |
98 | } | |
99 | ||
100 | /* | |
101 | * Interrupt routing: | |
102 | * | |
103 | * Primary bus | |
104 | * IdSel INTA INTB INTC INTD | |
105 | * 21052 13 - - - - | |
106 | * SIO 14 23 - - - | |
107 | * 21143 15 44 - - - | |
108 | * Slot 0 17 43 42 41 40 | |
109 | * | |
110 | * Secondary bus | |
111 | * IdSel INTA INTB INTC INTD | |
112 | * Slot 0 8 (18) 19 18 17 16 | |
113 | * Slot 1 9 (19) 31 30 29 28 | |
114 | * Slot 2 10 (20) 27 26 25 24 | |
115 | * Slot 3 11 (21) 39 38 37 36 | |
116 | * Slot 4 12 (22) 35 34 33 32 | |
117 | * 53c875 13 (23) 20 - - - | |
118 | * | |
119 | */ | |
120 | ||
814eae59 | 121 | static int |
d5341942 | 122 | ruffian_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
1da177e4 | 123 | { |
814eae59 | 124 | static char irq_tab[11][5] = { |
1da177e4 LT |
125 | /*INT INTA INTB INTC INTD */ |
126 | {-1, -1, -1, -1, -1}, /* IdSel 13, 21052 */ | |
127 | {-1, -1, -1, -1, -1}, /* IdSel 14, SIO */ | |
128 | {44, 44, 44, 44, 44}, /* IdSel 15, 21143 */ | |
129 | {-1, -1, -1, -1, -1}, /* IdSel 16, none */ | |
130 | {43, 43, 42, 41, 40}, /* IdSel 17, 64-bit slot */ | |
131 | /* the next 6 are actually on PCI bus 1, across the bridge */ | |
132 | {19, 19, 18, 17, 16}, /* IdSel 8, slot 0 */ | |
133 | {31, 31, 30, 29, 28}, /* IdSel 9, slot 1 */ | |
134 | {27, 27, 26, 25, 24}, /* IdSel 10, slot 2 */ | |
135 | {39, 39, 38, 37, 36}, /* IdSel 11, slot 3 */ | |
136 | {35, 35, 34, 33, 32}, /* IdSel 12, slot 4 */ | |
137 | {20, 20, 20, 20, 20}, /* IdSel 13, 53c875 */ | |
138 | }; | |
139 | const long min_idsel = 13, max_idsel = 23, irqs_per_slot = 5; | |
140 | return COMMON_TABLE_LOOKUP; | |
141 | } | |
142 | ||
814eae59 | 143 | static u8 |
1da177e4 LT |
144 | ruffian_swizzle(struct pci_dev *dev, u8 *pinp) |
145 | { | |
146 | int slot, pin = *pinp; | |
147 | ||
148 | if (dev->bus->number == 0) { | |
149 | slot = PCI_SLOT(dev->devfn); | |
150 | } | |
151 | /* Check for the built-in bridge. */ | |
152 | else if (PCI_SLOT(dev->bus->self->devfn) == 13) { | |
153 | slot = PCI_SLOT(dev->devfn) + 10; | |
154 | } | |
155 | else | |
156 | { | |
157 | /* Must be a card-based bridge. */ | |
158 | do { | |
159 | if (PCI_SLOT(dev->bus->self->devfn) == 13) { | |
160 | slot = PCI_SLOT(dev->devfn) + 10; | |
161 | break; | |
162 | } | |
1be9baa0 | 163 | pin = pci_swizzle_interrupt_pin(dev, pin); |
1da177e4 LT |
164 | |
165 | /* Move up the chain of bridges. */ | |
166 | dev = dev->bus->self; | |
167 | /* Slot of the next bridge. */ | |
168 | slot = PCI_SLOT(dev->devfn); | |
169 | } while (dev->bus->self); | |
170 | } | |
171 | *pinp = pin; | |
172 | return slot; | |
173 | } | |
174 | ||
175 | #ifdef BUILDING_FOR_MILO | |
176 | /* | |
177 | * The DeskStation Ruffian motherboard firmware does not place | |
178 | * the memory size in the PALimpure area. Therefore, we use | |
179 | * the Bank Configuration Registers in PYXIS to obtain the size. | |
180 | */ | |
181 | static unsigned long __init | |
182 | ruffian_get_bank_size(unsigned long offset) | |
183 | { | |
184 | unsigned long bank_addr, bank, ret = 0; | |
25c8716c | 185 | |
1da177e4 LT |
186 | /* Valid offsets are: 0x800, 0x840 and 0x880 |
187 | since Ruffian only uses three banks. */ | |
188 | bank_addr = (unsigned long)PYXIS_MCR + offset; | |
189 | bank = *(vulp)bank_addr; | |
25c8716c | 190 | |
1da177e4 LT |
191 | /* Check BANK_ENABLE */ |
192 | if (bank & 0x01) { | |
193 | static unsigned long size[] __initdata = { | |
25c8716c | 194 | 0x40000000UL, /* 0x00, 1G */ |
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195 | 0x20000000UL, /* 0x02, 512M */ |
196 | 0x10000000UL, /* 0x04, 256M */ | |
197 | 0x08000000UL, /* 0x06, 128M */ | |
198 | 0x04000000UL, /* 0x08, 64M */ | |
199 | 0x02000000UL, /* 0x0a, 32M */ | |
200 | 0x01000000UL, /* 0x0c, 16M */ | |
201 | 0x00800000UL, /* 0x0e, 8M */ | |
202 | 0x80000000UL, /* 0x10, 2G */ | |
203 | }; | |
204 | ||
205 | bank = (bank & 0x1e) >> 1; | |
25c8716c | 206 | if (bank < ARRAY_SIZE(size)) |
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207 | ret = size[bank]; |
208 | } | |
209 | ||
210 | return ret; | |
211 | } | |
212 | #endif /* BUILDING_FOR_MILO */ | |
213 | ||
214 | /* | |
215 | * The System Vector | |
216 | */ | |
217 | ||
218 | struct alpha_machine_vector ruffian_mv __initmv = { | |
219 | .vector_name = "Ruffian", | |
220 | DO_EV5_MMU, | |
221 | DO_DEFAULT_RTC, | |
222 | DO_PYXIS_IO, | |
223 | .machine_check = cia_machine_check, | |
224 | .max_isa_dma_address = ALPHA_RUFFIAN_MAX_ISA_DMA_ADDRESS, | |
225 | .min_io_address = DEFAULT_IO_BASE, | |
226 | .min_mem_address = DEFAULT_MEM_BASE, | |
227 | .pci_dac_offset = PYXIS_DAC_OFFSET, | |
228 | ||
229 | .nr_irqs = 48, | |
230 | .device_interrupt = pyxis_device_interrupt, | |
231 | ||
232 | .init_arch = pyxis_init_arch, | |
233 | .init_irq = ruffian_init_irq, | |
234 | .init_rtc = ruffian_init_rtc, | |
235 | .init_pci = cia_init_pci, | |
236 | .kill_arch = ruffian_kill_arch, | |
237 | .pci_map_irq = ruffian_map_irq, | |
238 | .pci_swizzle = ruffian_swizzle, | |
239 | }; | |
240 | ALIAS_MV(ruffian) |